The phase function for stellar acoustic oscillations - IV. Solar-like stars

Details The phase function for stellar acoustic oscillations - IV. Solar-like stars The phase function for stellar acoustic oscillations - IV. Solar-like stars

1997-06-06

arxiv.org/abs/astro-ph/9706062v1

Mon.Not.Roy.Astron.Soc. 295 (1998) 344-352

Astronomy and Astrophysics

Astrophysics

10 pages, 10 figures. Submitted to Mon. Not. R. astr. Soc

Scientific paper

10.1046/j.1365-8711.1998.01203.x

In recent years there has been some progress towards detecting solar-like oscillations in stars. The goal of this challenging project is to analyse frequency spectra similar to that observed for the Sun in integrated light. In this context it is important to investigate what can be learned about the structure and evolution of the stars frIn recent years there has been some progress towards detecting solar-like oscillations in stars. The goal of this challenging project is to analyse frequency spectra similar to that observed for the Sun in integrated light. In this context it is important to investigate what can be learned about the structure and evolution of the stars from such future observations. Here we concentrate on the structure of the upper layers, as reflected in the phase function. We show that it is possible to obtain this function from low-degree p modes, at least for stars on the main sequence. We analyse its dependence on several uncertainties in the structure of the uppermost layers. We also investigate a filtered phase function, which has properties that depend on the layers around the second helium ionization zone.om such future observations. Here we concentrate on the structure of the upper layers, as reflected in the phase function. We show that it is possible to obtain this function from low-degree p modes, at least for stars on the main sequence. We analyse its dependence on several uncertainties in the structure of the uppermost layers. We also investigate a filtered phase function, which has properties that depend on the layers around the second helium ionization zone.

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